Issue Subject Alternative Name for mail subdomain missing

[nilsglow]

Hi!
We try to secure our mail server (IMAP) with Letsencrypt. Plesk says that 'Mail access" (IMAP, POP, SMTP) is secured. But the certificate does not contain the mail.example.tld subdomain as a Subject Alternative Name. We told our customers to access the mail server via this subdomain...

Thanks,
Nils

 

[nilsglow]

It seems like that problem only occurs when NOT using wildcard certificates... But shouldn't it work with a SAN certificate including mail.example.tld as well?